Fe掺杂PTFE-PbO_2/TiO_2-NTs/Ti电极的制备、表征及电催化性能  

Preparation,characterization and electro-catalytic properties of Fe doped PTFE-PbO_2/TiO_2-NTs/Ti

作　　者：缪虹[1] 孙亚兵[1] 冯景伟[1,2] 王瑾瑜[1] 徐建华[1] 

机构地区：[1]污染控制与资源化研究国家重点实验室,南京大学环境学院,南京210046 [2]合肥工业大学土木与水利工程学院,合肥230009

出　　处：《环境化学》2012年第6期837-841,共5页Environmental Chemistry

基　　金：污染控制与资源化研究国家重点实验室开放课题(PCRRF10016);合肥工业大学科学研究发展基金(GDBJ2009-027);中央高校基本科研业务费专项资金项目(2011HGQC1029);流域水污染防治技术辅助决策支持平台研究与建筑(2009ZX07529-007-006-003)资助

摘　　要：采用电沉积法制备了Fe掺杂PTFE-PbO2/TiO2-NTs/Ti、PbO2/TiO2-NTs/Ti、PbO2/Ti 3种电极,运用扫描电镜、X射线衍射仪观察表面形貌与形态,通过线性扫描伏安法在0.1 mol·L-1的H2SO4中测定电极的析氧极化曲线.以对硝基酚(p-NP)为目标污染物,考察了电极的电催化活性,在20 mA.cm-2电流密度下降解100 mg·L-1 p-NP,120 min时表观速率常数分别为0.0370 min-1、0.0265 min-1和0.0180 min-1,COD去除率分别为77.38%、74.07%、66.18%,研究发现在相同的条件下Fe掺杂PTFE-PbO2/TiO2-NTs/Ti性能更佳,矿化更完全.Fe-doped PTFE-PbO2/TiO2-NTs/Ti, PbO2/TiO2-NTs/Ti and PbO2/Ti were prepared by anodic electrodeposition technique. The microstructure and morphology were analyzed by scanning electron microscope （SEM） and X-ray diffraction （XRD）. Polarization curves of oxygen evolution of the three electrodes were studied by linear sweep voltammetry in 0. 1 mol-L-1 H2 SO4 aqueous solution. The electro-catalysis of the fabricated electrodes was also investigated using p-nitrophenol （p-NP） as a model pollutant, p-Nitrophenol with 100 mg＂ L-1 concentration was treated under the current density of 20 mA . cm-2 for 120 min. The apparent rate constant was 0. 0370 min-1 , 0. 0265 min-1 and 0. 0180 min -1 , COD removal efficiency was 77.38% ,74. 07% and 66.18%, respectively. Compared with the other two electrodes, the Fe-doped PTFE- PbO2/TiOE-NTs/Ti had a better performance and the mineralization was greater.

关 键 词：Fe掺杂PTFE-PbO2/TiO2-NTs/Ti PbO2/Ti 电催化氧化 对硝基酚 

分 类 号：X703[环境科学与工程—环境工程] O643.32[理学—物理化学]